3938478552448 has 64 divisors (see below), whose sum is σ = 8559828576000. Its totient is φ = 1790144104960.

The previous prime is 3938478552443. The next prime is 3938478552451. The reversal of 3938478552448 is 8442558748393.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×3938478552448² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3938478552443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49464093 + ... + 49543651.

It is an arithmetic number, because the mean of its divisors is an integer number (133747321500).

Almost surely, 2^{3938478552448} is an apocalyptic number.

It is an amenable number.

3938478552448 is an abundant number, since it is smaller than the sum of its proper divisors (4621350023552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3938478552448 is a wasteful number, since it uses less digits than its factorization.

3938478552448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114743 (or 114731 counting only the distinct ones).

The product of its digits is 928972800, while the sum is 70.

The spelling of 3938478552448 in words is "three trillion, nine hundred thirty-eight billion, four hundred seventy-eight million, five hundred fifty-two thousand, four hundred forty-eight".